CVE-2021-39274: Xerosecurity SN1PER

Critical severity, CVSS 9.8. EPSS: 3.1% chance of exploitation in the next 30 days.

In XeroSecurity Sn1per 9.0 (free version), insecure directory permissions (0777) are set during installation, allowing an unprivileged user to modify the main application and the application configuration file. This results in arbitrary code execution with root privileges.

Affected products

• Xerosecurity SN1PER: version 9.0 only

Published 2021-08-19. Last modified 2026-06-17.